Grinding-machine.



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nivrrn erstens 'rarnnr anion.

wiLLAnn J. anni., or nnwarso, MICHIGAN.

GRINDINMACHIN. l

Specification of Lettersrlatent. Patented Sept, 274'r 1910,

TApplication filed February 11, 1999, Serial No. 477,399.- Renewedllareh 5. 191D. Serial No. 547,559.

l'b all whom it may concern.'

it known that l, l/ViLLAnn J. BELL, a ci izen ofv the VUnited States of America, residiiigat Newaygo, in the county of Ne waygo and State of Michigan, have invented certain'new and.- useful linprovenients in Grindiv gMachinesj; and l do hereby declare tne following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains Vto make and use the same.

My invention relates -to improvements in grinding machines, and more particularly tol ball and drum mills, and its object is to provide the samewith various new and useful features, hereinafter more fully described and particularly pointed out in the claims. My invention consists mainly of the combination and arrangement of a drum with conical truncated linings alternately ar` ranged in close relation whereby communieating chambers are formed in series within the drinn, said linings being supported by wood filling between the saine and the interior of the drum; the device alsobeing provided with perforated diaphragme at intervals whereby balls of different dimensions used in thesuccessive divisions of' the drum when worn down in the respective divisions will pass througlna diaphragm to the next division in series, whereby l am able to feed into the device :at the receiving end balls of the largest size, together with the coarse-rmateriah and the balls and material'will pass` from one division to vanother' succes sively, and. the division nearest the discharge end will containthe smallest balls;

It further consists in tlieeombination and arrangenient ot parts, as will niore'lully ap-` .,phragin; Fig. fl aring anddiaphragm at 4tache/d; Fig. 5 the diaphragm 13 `having the smaller openings; l4 1g. 6 the diaphragm 12 having the larger openings; Fig. "l, a section of the discharge screen on the line Tf' of F ig. l;

Fig. `S an enlarged transverse section -on tliei-iiie'S-S of Fig. illustrating the construction of the lining; and. Fig. S)

l a transverse section on the line 9-9 of Fig. 55

S of one segment of the lining.

Like numbers refer to like parts in'all of thc ligures.

l represents a cylindrical drum' on shell of any suitable dimensions; 2 the head at the' 69 .receiving end, and 3 the'head at the discharge end. These heads are detachable and serve to hold the' lining in place, and are also respectively provided with tubular -'journals 4 and 5' to receive and discharge the 65 material. In the journal l is inserted a feed pipe 6 to'supply the material tobe ground,

and the larger balls are supplied to the receiving end of the machine, preferably byremovingthe plug 6a and inserting the balls 70 through the receiving journal 4.

7 is a gear to rotate the drum, engaged by l the driving'pinion 8, actuated by a driving pulley 9, driven by a belt from any suitable beil to the next, and the large ends of the linings engage the interior of the drum.

truncated conical lining consists preferably of s'ix separate segments and the interior of the lining is corrugated-'in radial`lines as A illustrated in Figs. 7 and 8 to'prevent the balls from sliding thereon, an'dto carry the 90 balls up atr the upwardmovifng side of the drum. Each truncated conical section is held .in place between the abutting ends of the' ad- "j'acent sections, and the heads at the end'sjof the series, wherebyv they are retained in place 95 without other fastening means. At intervals the drum is divided into compartments consisting of one or more of these chambers vby perforated diaphragms; two being shown,

at. 'l2 and 13 respectively. These dia- 1 00 i phragins are preferably inl the form of perforated disks as shown in Fig. Il with the margins.overlapping the small ends of the conical linings .and beveled to tit the saine;

cham* Each Eaclrdiaphragin issecured in place by a 1.05

ring l5, having a beveled margin opposite the beveled margin Aofthe respective dia# phragm and bolts extending through the Y come loosened.

rings and diaphragme close inside the small end s of the conical linings, as illustrated in Figs. 1 and 5. The diaphragm l2 is provided with openings somewhat smaller than the balls when the latter are first placed in the machine, and the diaphragm 13 has still smaller openings. Anyinimber of these diaphragms may be cused as found convenientA and preferable, each succeeding diaphragm having smaller openings to permit. the balls to pass therethrough. as they become reduced in size by Wear. The exit. opening in the head 3 is covered by a cap having a cylindrical portion extending inward and provided with narrow slits or openings through which only the sutliciently pulverized material can escape into'the hollouv journal 5 at oli" a head, thus being very easily assembled,

or repaired, as occasion requires, and there are no bolts or fastenings to wear out or be- The form of these double truncated conical chambers is such that the bulk of the material and balls therein is carried nearer to the axis of the drum than in a drum having a plain cylindrical interior. The drum is thus more easily rotated, resulting in a saving of power. mainly where the balls roll doivn over the surface of the mass thereof, is substantially the same as though. the drum Were cylindrical inside and at the same time a much A less quantity ot balls are required.

vmill for' various materials, it is mainly inlVhi-le thismachine may be used 'as a ball tended for `pulverizing cement, using pebbles therein for balls. These pebbles by use are gradually reduced in Asize andas theybecome so reduced, they will pass through the openings in the first diaphragm and into the next compartment and being therein again gradually Worn down, will pass from thence into the next compartment and so on according to the number of compartments and size of openings in the diaphragme, being finally retained in the last compartment until Worn down suliiciently to escape with the material, or removed therefrom as occasion may require.

What I claim is l. Ina millof the class described, a cylinder, a lining therefor comprising a plurality of sections, each section being composed of a plurality of division plates, each section The action beingermee 2. A ball and drum inill, comprising a drum having a series ot communicating chambers, perforated dia-plnfagms between the respective chambers. said diaphragnis having openings large enough to permit the balls to pass successircly' theri-ithrougli when the balls 'have been reduced by wear in cach chamber, means for rotating the drum. and means tor supplying balls to the first chamber of the drum.

3. A ball and drum mill, comprising a drum having a series of chambers communieating by means or" axial openings of less diameter than the chambers, diaphragme at intervals in the drum and having progressively reduced openings therein large enough to permit balls of the sizes commonly used to pass successively therethrough after said balls have been reduced in sise by use, means for rotating the drum, and meansfor supplying balls and material to said drum.

JLA ball and druin rn'ill, comprising a (lrum, and a lining for the drum consisting ot' separate truncated conical sections ar.- ranged end to end, each section having its small end abutting against the small end of the adjacent section, and its large end 'abut ting against the large end of the adjacent section, and means for securing the end sections of the series inplace.

5. A ball and drum mill, comprising a drum, a liningtor the drum consistingof alternately disposed truncated conica-l portions, said portions engaging end to end, a filling between the lining and drum, and' held in place thereby, means :tor rotating the drum, and means for suppl-ying halls and material to the drum.

6. A ball and drum mill, comprising a drum, and a lining for the drum 'consisting of separate truncated conical' sections engag ing theinterior or' the drum at their larger ends, each section being divided longitudi nally into segments and each section abutting against the respective adjacent section' at the respective ends, and the end sections of the series held in place by removable heads to the drum.

7. A ball and drum mill, comprising a drum having detachable heads, a lining consisting oitl a series of alternately arranged truncated conical sections each'section being radially corrugated and abutting end to end with adjacent sections and held at the ends ot the series by the heads, means for rotating the drum, and means for supplying halls and material to said drum. v-

8. A ball and drum mill, comprising a drum having tubular journals, a lining to said drum consisting of a series of oppositely arranged truncated conical portions, a perforated diaphragm engaging the small end of a cone and a ring secured to the diaphragm and engaging tlie small end of the adjacent' cone, and means for attaching the ring and .diaphragm to each other.

9. A ball and drum mill, comprising a drum, a lining consisting of a series of oppositely arranged truncated conical portions,

wood lilling between the lining and drum,

perforated diaphragme at intervals in the drum, detachable heads to the drum having tubular journals, a feed pipe opening into one journal, and an eXit screen between the other journal and the interior ofthe drum.

10. A ball and drum mill comprising a drum having removable heads, a removable lining consisting of truncated conical sections held in place solely by the drum andv heads, a filling between the lining and drum, perforated' diaphragms at intervals in the drum engaging the small end of a respective section of lining, and a ring attached to each diaphragm and engaging the small end of the adjacent section of lining, and means for rotating the drum.

In testimony whereof I aiiix my signature in presence of two Witnesses.

VVILLARD J. BELL.

' I Vitnesses 

